Mr. Mak's Grade 8 Science Website

Introduction to Mechanical Advantage and Levers List five things machines do. (p 8) A machine is a _______________ made of one or more _______________ that work together to accomplish a task. (p. 8) Describe the subsystems a can opener is made of and what the role of each subsystem is. (p. 8/figure 2) Explain what a mechanism is. (p. 8) In your own words, explain what a self-correcting control is. (p. 9) Explain what a lever is. (p. 10) Give four or five real-world examples of levers. (p. 10) Explain why are levers useful. (p. 10) Levers are broken down into three types. List them. (p. 10) Give one or two real-world examples for each type of lever. (p. 10/11/figure 1/2/3) All levers require a fulcrum, load force and effort force. Explain what each of these are. (p. 10) Make a quick sketch of a Class I, Class II and Class III level. Neatly label the fulcrum, effort force and load force on each diagram you made. Also label the load arm and

*The unit test is on  Thursday, April 12 *If you are absent due to illness or athletics it is your responsibility to arrange a make-up date with Mr. Mak as soon as possible *Extra help is ALWAYS available - speak to Mr. Mak -What are fluids? Which two states of matter? -Aerodynamics and real-world uses/examples -Hydrodynamics and real-world uses/examples -Laminar vs. turbulent flow of fluids -Viscosity - thick vs. thin, high vs. low, how cohesion impacts viscosity, flow rate -Explain the difference between mass and weight -Know common units for mass, weight and volume -Archimedes' Principle - How to find the volume of irregular objects using displacement -What is density? -Solve questions using the density formula (with proper units!) -Describe the impact of temperature on density and viscosity using particle  theory -Buoyancy - positive, neutral and negative - describe the forces  involved (gravity vs. buoyant force) -What is ballast? Give real-world examples (i.e.